ANALOG DEVICES ADA4862-3 Service Manual

High Speed, G = +2,

www.BDTIC.com/ADI

FEATURES

Ideal for RGB/HD/SD video

Supports 1080i/720p resolution

High speed

−3 dB bandwidth: 300 MHz
Slew rate: 750 V/μs

Settling time: 9 ns ( 0.5%)

0.1 dB flatness: 65 MHz
Differential gain: 0.02%
Differential phase: 0.03°
Wide supply range: 5 V to 12 V
Low power: 5.3 mA/amp
Low voltage offset (RTO): 3.5 mV (typ)
High output current: 25 mA
Also configurable for gains of +1, −1
Power-down

APPLICATIONS

Consumer video
Professional video
Filter buffers

GENERAL DESCRIPTION

Low Cost, Triple Op Amp

ADA4862-3

PIN CONFIGURATION

POWER DOWN 1

POWER DOWN 2

POWER DOWN 3

+V

+IN 1

–IN 1

V

OUT

1

2

3

ADA4862-3

4

S

5

550Ω 550Ω

6

7

1

550Ω 550Ω

Figure 1. 14-Lead SOIC (R-14)

550Ω

550Ω

14

V

2

OUT

13

–IN 2

12

+IN 2

11

–V

S

10

+IN 3

9

–IN 3

8

V

3

OUT

05600-001

The ADA4862-3 (triple) is a low cost, high speed, internally
fixed, G = +2 op amp, which provides excellent overall
performance for high definition and RGB video applications.
The 300 MHz, G = +2, −3 dB bandwidth, and 750 V/μs slew
rate make this amplifier well suited for many high speed
applications. The ADA4862-3 can also be configured to
operate in gains of G = +1 and G = −1.

With its combination of low price, excellent differential gain
(0.02%), dif

ferential phase (0.03°), and 0.1 dB flatness out to
65 MHz, this amplifier is ideal for both consumer and
professional video applications.

The ADA4862-3 is designed to operate on supply voltages as
lo

w as +5 V and up to ±5 V using only 5.3 mA/amp of supply
current. To further reduce power consumption, each amplifier
is equipped with a power-down feature that lowers the supply
current to 200 μA/amp. The ADA4862-3 also consumes less
board area because feedback and gain set resistors are on-chip.
Having the resistors on chip simplifies layout and minimizes the
required board space.

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.

The ADA4862-3 is available in a 14-lead SOIC package and is
desig

ned to work in the extended temperature range of −40°C

to +105°C.

6.1

6.0

5.9
G = +2

5.8

R

= 150Ω

L

C

= 4pF

L

5.7

V

= 2V p-p

OUT

5.6

5.5

5.4

CLOSED-LOOP GAIN (dB)

5.3

5.2

5.1

0.1 1000

1 10 100

FREQUENCY (MHz)

VS = ±5V

Figure 2. Large Signal 0.1 dB Bandwidth for Various Supplies

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

VS = +5V

05600-022

ADA4862-3

www.BDTIC.com/ADI

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications..................................................................................... 11

Applications....................................................................................... 1

Pin Configuration............................................................................. 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution.................................................................................. 5

Typical Performance Characteristics ............................................. 6

REVISION HISTORY

8/05—Rev. 0 to Rev. A

Changes to Ordering Guide.......................................................... 15

7/05—Revision 0: Initial Version

Using the ADA4862-3 in Gains = +1, −1................................ 11

Video Line Driver....................................................................... 13

Single-Supply Operation ........................................................... 13

Power Down ................................................................................ 13

Layout Considerations............................................................... 14

Power Supply Bypassing ............................................................ 14

Outline Dimensions ....................................................................... 15

Ordering Guide .......................................................................... 15

Rev. A | Page 2 of 16

ADA4862-3

www.BDTIC.com/ADI

SPECIFICATIONS

VS = +5 V (@TA = 25oC, G = +2, RL = 150 Ω, unless otherwise noted).

Table 1.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

–3 dB Bandwidth VO = 0.2 V p-p 300 MHz
V

G = +1 VO = 0.2 V p-p 620 MHz
Bandwidth for 0.1 dB Flatness VO = 2 V p-p 65 MHz
+Slew Rate (Rising Edge) VO = 2 V p-p 750 V/μs

−Slew Rate (Falling Edge) VO = 2 V p-p 600 V/μs
Settling Time to 0.5% VO = 2 V step 9 ns

DISTORTION/NOISE PERFORMANCE

Harmonic Distortion HD2 fC = 1 MHz, VO = 2 V p-p −81 dBc
Harmonic Distortion HD3 fC = 1 MHz, VO = 2 V p-p −88 dBc
Harmonic Distortion HD2 fC = 5 MHz, VO = 2 V p-p −68 dBc
Harmonic Distortion HD3 fC = 5 MHz, VO = 2 V p-p −76 dBc
Voltage Noise (RTO) f = 100 kHz 10.6 nV/√Hz
Current Noise (RTI) f = 100 kHz, +IN 1.4 pA/√Hz
Differential Gain 0.02 %
Differential Phase 0.03 Degrees
Crosstalk

DC PERFORMANCE

Offset Voltage (RTO) Referred to output (RTO) −25 +3.5 +25 mV
+Input Bias Current −2.5 −0.6 +1 μA
Gain Accuracy 1.9 2 2.1 V/V

INPUT CHARACTERISTICS

Input Resistance +IN 13 MΩ
Input Capacitance +IN 2 pF
Input Common-Mode Voltage Range G = +1 1 to 4 V

POWER DOWN PIN

Input Voltage Enabled 0.6 V
Power down 1.8 V
Bias Current Enabled −3 μA
Power down 115 μA
Turn-On Time 3.5 μs
Turn-Off Time 200 ns

OUTPUT CHARACTERISTICS

Output Overdrive Recovery Time (Rise/Fall) VIN = +2.25 V to −0.25 V 85/50 ns
Output Voltage Swing RL = 150 Ω 1.2 to 3.8 V
Output Voltage Swing RL = 1 kΩ 1 to 4 V
Short-Circuit Current Sinking or sourcing 65 mA

POWER SUPPLY

Operating Range 5 12 V
Total Quiescent Current Enabled 14 16 18 mA
Quiescent Current /Amplifier Power down = +V
Power Supply Rejection Ratio (RTO) dB

+PSR +VS = 2 V to 3 V, −VS = −2.5 V −52 −55 dB

−PSR

= 2 V p-p 200 MHz

O

Amplifier 1 driven, Amplifier 2 output

ed, f = 1 MHz

measur

S

= 2.5 V, −VS = −2 V to −3 V

+V

S

Power Down pin = −V

S

−75 dB

0.2 0.33 mA

−49 −52 dB

Rev. A | Page 3 of 16

ADA4862-3

www.BDTIC.com/ADI

VS = ±5 V (@TA = +25oC, G = +2, RL = 150 Ω, unless otherwise noted).

Table 2.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

–3 dB Bandwidth VO = 0.2 V p-p 310 MHz

V

G = +1 VO = 0.2 V p-p 720 MHz
Bandwidth for 0.1 dB Flatness VO = 2 V p-p 54 MHz
+Slew Rate (Rising Edge) VO = 2 V p-p 1050 V/μs

−Slew Rate (Falling Edge) VO = 2 V p-p 830 V/μs
Settling Time to 0.5% VO = 2 V step 9 ns

DISTORTION/NOISE PERFORMANCE

Harmonic Distortion HD2 fC = 1 MHz, VO = 2 V p-p −87 dBc
Harmonic Distortion HD3 fC = 1 MHz, VO = 2 V p-p −100 dBc
Harmonic Distortion HD2 fC = 5 MHz, VO = 2 V p-p −74 dBc
Harmonic Distortion HD3 fC = 5 MHz, VO = 2 V p-p −90 dBc
Voltage Noise (RTO) f = 100 kHz 10.6 nV/√Hz
Current Noise (RTI) f = 100 kHz, +IN 1.4 pA/√Hz
Differential Gain 0.01 %
Differential Phase 0.02 Degrees
Crosstalk

DC PERFORMANCE

Offset Voltage (RTO) −25 +2 +25 mV
+Input Bias Current
Gain Accuracy 1.9 2 2.1 V/V

INPUT CHARACTERISTICS

Input Resistance +IN 14 MΩ
Input Capacitance +IN 2 pF
Input Common-Mode Voltage Range G = +1 −3.7 to +3.8 V

POWER DOWN PIN

Input Voltage Enabled −4.4 V
Power down −3.2 V
Bias Current Enabled
Power down
Turn-On Time 3.5 μs
Turn-Off Time 200 ns

OUTPUT CHARACTERISTICS

Output Overdrive Recovery Time (Rise/Fall) VIN = ±3.0 V 85/40 ns
Output Voltage Swing RL = 150 Ω −3.5 to +3.5 V
Output Voltage Swing RL = 1 kΩ −3.9 to +3.9 V
Short-Circuit Current Sinking or sourcing 115 mA

POWER SUPPLY

Operating Range 5 12 V
Total Quiescent Current Enabled 14.5 17.9 20.5 mA
Quiescent Current/Amplifier Power down = +V
Power Supply Rejection Ratio (RTO) dB

+PSR +VS = 4 V to 6 V, −VS = −5 V −54 −57 dB

−PSR

= 2 V p-p 260 MHz

O

Amplifier 1 driven, Amplifier 2 output

ed, f = 1 MHz

measur

−2.5 −0.6 +1 μA

S

= 5 V, −VS = −4 V to −6 V,

+V

S

Power Down pin = −V

S

−75 dB

−3 μA
250 μA

0.3 0.5 mA

+50.5 −54 dB

Rev. A | Page 4 of 16

ADA4862-3

www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter Rating

Supply Voltage 12.6 V
Power Dissipation See Figure 3
Common-Mode Input Voltage

±V

S

Storage Temperature −65°C to +125°C
Operating Temperature Range −40°C to +105°C
Lead Temperature JEDEC J-STD-20
Junction Temperature 150°C

The power dissipated in the package (P

) is the sum of the

D

quiescent power dissipation and the power dissipated in the die due
to the amplifier’s drive at the output. The quiescent power is the
voltage between the supply pins (V

= Quiescent Power + (Tota l D ri v e P o we r − Load Power)

P

D

⎛

()

D

S

IVP

SS

×+×=

⎜

2

⎝

) × the quiescent current (IS).

S

2

OUT

R

V

⎞

OUT

–

⎟

R

L

L

⎠

VV

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, θJA is
specified for device soldered in circuit board for surface-mount
packages.

Table 4. Thermal Resistance

Package Type θ

JA

14-lead SOIC 90 °C/W

Maximum Power Dissipation

The maximum safe power dissipation for the ADA4862-3 is
limited by the associated rise in junction temperature (T
the die. At approximately 150°C, which is the glass transition
temperature, the plastic changes its properties. Even
temporarily exceeding this temperature limit may change the
stresses that the package exerts on the die, permanently shifting
the parametric performance of the amplifiers. Exceeding a
junction temperature of 150°C for an extended period can
result in changes in silicon devices, potentially causing
degradation or loss of functionality.

Unit

) on

J

RMS output voltages should be considered.

Airflow increases heat dissipation, effectively reducing θ

.

JA

In addition, more metal directly in contact with the package
leads and through holes under the device reduces θ

.

JA

Figure 3 shows the maximum safe power dissipation in the

ackage vs. the ambient temperature for the 14-lead SOIC

p
(90°C/W) on a JEDEC standard 4-layer board. θ

values are

JA

approximations.

2.5

2.0

1.5

1.0

0.5

MAXIMUM POWER DISSIPATION (W)

0

–55 125–45 –35 –25 –15 –5 5 15 25 35 45 55 65 75 85 95 105 115

Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board

AMBIENT TEMPERATURE (°C)

05600-036

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. A | Page 5 of 16